On recent form this would be 5th v 7th in the league.
Arsenal on a bit of a league slump and Chelsea getting back to form would sugest a draw or Chelsea win, but then Chelsea have only beaten Arsene Wenger's Arsenal twice in the Premier League, both under Jose Mourinho.
Glenn Hoddle 2 and Dave Webb 1 are the other Chelsea managers to beat Arsenal in the Premier League.

Chelsea v Arsenal last 5 home results

Dec 10th 2006
Chelsea
1
-
1
Arsenal


Aug 21st 2005
Chelsea
1
-
0
Arsenal


Apr 20th 2005
Chelsea
0
-
0
Arsenal


Feb 21st 2004
Chelsea
1
-
2
Arsenal


Sep 1st 2002
Chelsea
1
-
1
Arsenal